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For Electrical Interface, click here

Configuration and Jumper Options

SCSI ID Selection

Jumpers at ID0, ID1, and ID2 select the SCSI address. Each SCSI device on one Host Adapter must have a unique address. Note that there are two identical groups of address jumpers (one on the board; the other on the Option Jumper Block). Use either group for address selection but not both at the same time.

 
	SCSI ID		ID2	ID1	ID0

	0		out	out	out
	1		out	out	in
	2		out	in	out
	3		out	in	in
	4		in	out	out
	5		in	out	in
	6		in	in	out
	7 (Default)	in	in	in

Interface Termination

RN1 and RN2 provide active termination for the SCSI interface lines. (Active termination is recommended when multiple drives are used on the same SCSI cable.) The default is RN1 and RN2 installed.

SCSI terminators are installed only in the end devices on the SCSI cable; remove the terminators from each of the other devices. The SCSI Host Adapter card and the last drive in the chain should have terminators.

Terminator Power

W1 and W2 select the source of power (+5V) for terminators RN1 and RN2; W3 controls the drive supplying +5V to the bus.

   W1    W2    W3

    Y     N     -     Drive provides terminator power. (Default)
    N     Y     -     Host provides terminator pwr via J1 pin 26 
                          to RN1 and RN2

    -     -     Y     Drive supplies +5V to the bus via J1 pin 26.
                          (Default)

Spindle Options

Jumpers at SP0 and SP1 control the spindle options.

   SP0    SP1
     N      N     The drive starts the spindle motor at power-on. 
                       (Default)
     Y      N     The drive waits for a Start Unit SCSI command
                       to start the spindle motor.
     N      Y     Spindle start-up is delayed based on SCSI ID 
                       address (12 seconds per ID)

Write Protect

A jumper at WP selects the write protect option.

    Jumper	The drive is write protected.
    No Jumper	The drive is not write protected. (Default)

Parity

A jumper at PTY selects the bus parity check option. The drive always generates parity regardless of this option..

    Jumper	SCSI interface parity checking disabled.
    No Jumper	SCSI interface parity checking on. (Default)

Spindle Sync Termination

Jumpers at W10 and W11 control spindle sync termination. This depends on system configuration; i.e., Master Mode or Master Controller Mode.

	W10	W11

	Yes	Yes	Slave and Master Sync are terminated.

	No	No	Spindle sync not terminated. (Default)

Remote LED

A user-supplied LED may be connected to Remote LED.